Process for producing garnet single crystal

A process for producing a single crystal having a garnet structure comprising:

• melting a tip portion of a source rod formed of a crystal having a garnet structure, bringing a seed crystal into contact with said molten tip portion, and pulling said seed crystal upward to grow a fibrous single crystal;
• wherein the pull-up direction of said seed crystal is set in a direction falling within a specific range apart from a direction crystallographically equivalent to a <100>
• orientation of said seed crystal at an angle of at least 10.degree., from a direction crystallographically equivalent to a <110>
• orientation thereof at an angle of at least 20.degree. and from a direction crystallographically equivalent to a <211>
• orientation thereof at an angle of at least 20.degree..

A process for producing a single crystal having a garnet structure comprising:

• bringing a seed crystal into contact with a melt of a crystal having a garnet structure and contained in a crucible, and pulling said seed crystal upward while revolving said seed crystal to effect growth of a rod-like single crystal;
• wherein the pull-up direction of said seed crystal is set in agreement with a direction falling within a specific range apart from a direction crystallographically equivalent to a <100>
• orientation of said seed crystal at an angle of at least 10.degree., from a direction crystallographically equivalent to a <110>
• orientation thereof at an angle of at least 20.degree. and from a direction crystalloqraphically equivalent to a <211>
• orientation thereof at an angle of at least 20.degree..